STATS Quiz 3.5 - 3.9

Identify the sampling method:

A community college student interviews the first 100 students to enter the building to determine the percentage of students that own a car.

• SRS

• Stratified

• Cluster

• Convenience

• Voluntary Response

Tags

CCSS.HSS.IC.B.3

Identify the sampling method:

The names of 70 contestants are written on 70 cards, The cards are placed in a bag, and three names are picked from the bag.

• SRS

• Systematic

• Stratified

• Cluster

• Convenience

Tags

CCSS.HSS.IC.B.3

A company wants to know the opinion of a rural community on a proposed ballot initiative. Half of the community does not have internet access, so the company sends emails to the 380 members that do have internet access. Of those surveyed, 372 of the community members responded to the survey. Which of the following is the most significant source of bias in the survey?

• Voluntary Response Bias

• Undercoverage

• Nonresponse Bias

• Response Bias

Tags

CCSS.HSS.IC.B.3

Identify the Sample:

A restaurant wants to know if customers buy dessert when they eat out. As people leave the restaurant one evening, 20 people are surveyed at random. Eight people say they usually order dessert when they eat out. The restaurant concluded that most customers do not order dessert.

• 20 customers

• 8 customers

• All customers

• Dessert

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

If we collected many different sample groups from the same population, we would expect each sample to give slightly different estimates for the population parameter due to the natural differences between the samples. This is known as:

• Simpson's Paradox

• Response bias

• Stratification

• Sampling variability

Tags

CCSS.6.SP.A.3

What is a placebo?

• the treatment of an experiment

• a false treatment in an experiment

• when a person feels as if they experience a false change

• an amusement park ride

Tags

CCSS.RI.11-12.3

CCSS.RI.11-12.5

CCSS.RI.8.5

CCSS.RI.9-10.3

CCSS.RI.9-10.5

Why do we randomly select our samples?

• for control
• reduce bias
• so we don't get the same answers from everyone
• to eliminate confounding results

Tags

CCSS.HSS.IC.B.3

What is the purpose of the random assignment of treatments to subjects in an experiment?

• To create roughly equivalent groups before treatments are administered.

• To prevent certain groups in the population from being systematically excluded in the experiment.

• To reduce bias in the selection of the subjects to be included in the experiment.

• To eliminate the need for blinding in an experiment.

Tags

CCSS.HSS.IC.B.3

A recent study showed that teenagers who had night lights in their rooms as babies are more likely to suffer from myopia (near sightedness) than teenagers who had not used night lights. But genetic factors are known to play a role, and near-sighted parents are more likely to install a night light in their children’s room. This makes it hard to tell if the night light caused the myopia. This is an example of

• double-blinding.

• the placebo effect.

• a confounding variable.

• an explanatory variable.

Which of the following is a valid statistical question?

• How many people voted in the last school board election?

• How many points were scored by the New England Patriots during the 2014-15 regular NFL season?

• How long will you be in line when your get lunch from the cafeteria?

• How tall is Mount Everest?

Tags

CCSS.6.SP.A.1